51373849 has 2 divisors, whose sum is σ = 51373850. Its totient is φ = 51373848.

The previous prime is 51373841. The next prime is 51373873. The reversal of 51373849 is 94837315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34727449 + 16646400 = 5893^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 51373849 - 2³ = 51373841 is a prime.

It is a super-2 number, since 2×51373849² = 5278544722149602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51373841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25686924 + 25686925.

It is an arithmetic number, because the mean of its divisors is an integer number (25686925).

Almost surely, 2^51373849 is an apocalyptic number.

It is an amenable number.

51373849 is a deficient number, since it is larger than the sum of its proper divisors (1).

51373849 is an equidigital number, since it uses as much as digits as its factorization.

51373849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 51373849 is about 7167.5553014958. Note that the first 3 decimals coincide. The cubic root of 51373849 is about 371.7469108467.

The spelling of 51373849 in words is "fifty-one million, three hundred seventy-three thousand, eight hundred forty-nine".